CVE-2021-21252
Regular expression denial of service in jquery-validation
The jQuery Validation Plugin provides drop-in validation for your existing forms. It is published as an npm package "jquery-validation". jquery-validation before version 1.19.3 contains one or more regular expressions that are vulnerable to ReDoS (Regular Expression Denial of Service). This is fixed in 1.19.3.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Regular expression denial of service in jquery-validation
The jQuery Validation Plugin provides drop-in validation for your existing forms. It is published as an npm package "jquery-validation". jquery-validation before version 1.19.3 contains one or more regular expressions that are vulnerable to ReDoS (Regular Expression Denial of Service). This is fixed in 1.19.3.
- Record
CVE-2021-21252- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-400
- Updated
- 2026-11-02
EUVDEUVD-2021-0508
The jQuery Validation Plugin provides drop-in validation for your existing forms. It is published as an npm package "jquery-validation". jquery-validation before version 1.19.3 contains one or more regular expressions that are vulnerable to ReDoS (Regular Expression Denial of Service). This is fixed in 1.19.3.
- Record
EUVD-2021-0508- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-jxwx-85vp-gvwm
Regular Expression Denial of Service in jquery-validation
The GitHub Security Lab team has identified potential security vulnerabilities in jquery.validation.
The project contains one or more regular expressions that are vulnerable to ReDoS (Regular Expression Denial of Service)
This issue was discovered and reported by GitHub team member @erik-krogh (Erik Krogh Kristensen).
- Record
GHSA-jxwx-85vp-gvwm- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
NVD
The jQuery Validation Plugin provides drop-in validation for your existing forms. It is published as an npm package "jquery-validation". jquery-validation before version 1.19.3 contains one or more regular expressions that are vulnerable to ReDoS (Regular Expression Denial of Service). This is fixed in 1.19.3.
- Record
CVE-2021-21252- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-400
- Updated
- 2026-11-02
OSV
The jQuery Validation Plugin provides drop-in validation for your existing forms. It is published as an npm package "jquery-validation". jquery-validation before version 1.19.3 contains one or more regular expressions that are vulnerable to ReDoS (Regular Expression Denial of Service). This is fixed in 1.19.3.
- Record
CVE-2021-21252- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-21252
The jQuery Validation Plugin provides drop-in validation for your existing forms. It is published as an npm package "jquery-validation". jquery-validation before version 1.19.3 contains one or more regular expressions that are vulnerable to ReDoS (Regular Expression Denial of Service). This is fixed in 1.19.3.
- Record
DEBIAN-CVE-2021-21252- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-jxwx-85vp-gvwm
Regular Expression Denial of Service in jquery-validation
The GitHub Security Lab team has identified potential security vulnerabilities in jquery.validation.
The project contains one or more regular expressions that are vulnerable to ReDoS (Regular Expression Denial of Service)
This issue was discovered and reported by GitHub team member @erik-krogh (Erik Krogh Kristensen).
- Record
GHSA-jxwx-85vp-gvwm- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-21252
The jQuery Validation Plugin provides drop-in validation for your existing forms. It is published as an npm package "jquery-validation". jquery-validation before version 1.19.3 contains one or more regular expressions that are vulnerable to ReDoS (Regular Expression Denial of Service). This is fixed in 1.19.3.
- Record
UBUNTU-CVE-2021-21252- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVCLSA-2026-1773101704 No score
TuxCare security update for jquery-validation (4 CVEs)
TuxCare rebuilt jquery-validation to address 4 CVEs. Fixed in 1.19.0-tuxcare.1.
- Record
CLSA-2026-1773101704- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
jquery-validationnpm |
before 1.19.3 | 1.19.3 |
jQuery.ValidationNuGet |
before 1.19.3 | 1.19.3 |
jquery-validationTuxCare:npm From an advisory covering 4 CVEs |
1.19.0-tuxcare.0 up to 1.19.0-tuxcare.1, plus listed versions 1.19.0 |
1.19.0-tuxcare.1 |
phpmyadminDebian:12 |
before 4:5.0.4+dfsg2-2 | 4:5.0.4+dfsg2-2 |
phpmyadminDebian:13 |
before 4:5.0.4+dfsg2-2 | 4:5.0.4+dfsg2-2 |
phpmyadminDebian:14 |
before 4:5.0.4+dfsg2-2 | 4:5.0.4+dfsg2-2 |
otrs2Debian:10 From an advisory covering 32 CVEs |
before 6.0.16-2+deb10u1, plus listed versions 2.0.4p01-102.0.4p01-112.0.4p01-122.0.4p01-132.0.4p01-14 Show 45 moreShow less2.0.4p01-14.12.0.4p01-152.0.4p01-162.0.4p01-172.0.4p01-182.0.4p01-62.0.4p01-72.0.4p01-82.0.4p01-92.0.99beta1-12.0.99beta1-22.1.1-12.1.3-12.1.4-12.1.4-22.1.5-12.1.5-22.1.5-32.1.6-12.1.7-12.1.7-22.2.0~beta2-12.2.0~beta3-12.2.1-12.2.2-12.2.3-12.2.4-12.2.5-12.2.5-22.2.6-12.2.7-12.2.7-22.2.7-2lenny12.2.7-2lenny22.2.7-2lenny32.2.7-32.3.2-12.3.2-22.3.3-12.3.4-12.3.4-22.3.4-32.3.4-42.3.4-52.3.4-6 |
6.0.16-2+deb10u1 |
jQuery.ValidationNuGet |
before 1.19.3, plus listed versions 1.10.01.11.01.11.11.12.01.13.0 Show 15 moreShow less1.13.11.14.01.15.01.15.11.16.01.17.01.19.11.19.21.6.01.7.01.8.01.8.0.11.8.11.9.01.9.0.1 |
1.19.3 |
phpmyadminUbuntu:Pro:14.04:LTS |
All versions, plus listed versions 4:4.0.6-14:4.0.8-14:4.0.9-14:4.0.10-14:4.0.10-1ubuntu0.1 Show 4 moreShow less4:4.0.10-1ubuntu0.1+esm14:4.0.10-1ubuntu0.1+esm24:4.0.10-1ubuntu0.1+esm34:4.0.10-1ubuntu0.1+esm4 |
None known |
civicrmUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 4.7.1+dfsg-14.7.1+dfsg-24.7.1+dfsg-2ubuntu14.7.1+dfsg-2ubuntu1+esm1 |
None known |
Show 10 moreShow less
| Package | Affected | Fixed |
|---|---|---|
otrs2Ubuntu:16.04:LTS |
All versions, plus listed versions 4.0.10-15.0.1-15.0.1-25.0.2-15.0.3-15.0.5-15.0.6-15.0.7-1 |
None known |
phpmyadminUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 4:4.4.13.1-14:4.5.0.2-24:4.5.1-14:4.5.1-24:4.5.1-3 Show 13 moreShow less4:4.5.2-14:4.5.2-24:4.5.3.1-14:4.5.4-14:4.5.4.1-24:4.5.4.1-2ubuntu14:4.5.4.1-2ubuntu24:4.5.4.1-2ubuntu2.14:4.5.4.1-2ubuntu2.1+esm24:4.5.4.1-2ubuntu2.1+esm34:4.5.4.1-2ubuntu2.1+esm44:4.5.4.1-2ubuntu2.1+esm54:4.5.4.1-2ubuntu2.1+esm6 |
None known |
civicrmUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 4.7.23+dfsg-1ubuntu14.7.24+dfsg-1ubuntu14.7.30+dfsg-1ubuntu14.7.30+dfsg-1ubuntu1+esm1 |
None known |
otrs2Ubuntu:18.04:LTS |
All versions, plus listed versions 5.0.23-15.0.24-16.0.1-16.0.2-16.0.3-16.0.4-16.0.5-1 |
None known |
phpmyadminUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 4:4.6.6-54:4.6.6-5ubuntu0.2+esm14:4.6.6-5ubuntu0.2+esm24:4.6.6-5ubuntu0.54:4.6.6-5ubuntu0.5+esm1 |
None known |
civicrmUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 5.11.0+dfsg-15.18.1+dfsg-15.20.3+dfsg-15.21.0+dfsg-15.21.1+dfsg-15.21.2+dfsg-15.21.2+dfsg-1ubuntu0.1~esm1 |
None known |
otrs2Ubuntu:20.04:LTS |
All versions, plus listed versions 6.0.20-16.0.23-26.0.24-16.0.25-16.0.25-26.0.25-36.0.26-1 |
None known |
phpmyadminUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 4:4.9.1+dfsg1-24:4.9.2+dfsg1-14:4.9.5+dfsg1-1ubuntu14:4.9.5+dfsg1-24:4.9.5+dfsg1-2ubuntu0.1~esm1 |
None known |
otrs2Ubuntu:22.04:LTS |
All versions, plus listed versions 6.0.32-66.1.2-16.2.1-16.2.2-2 |
None known |
civicrmUbuntu:Pro:22.04:LTS |
All versions, plus listed versions 5.33.2+dfsg1-15.33.2+dfsg1-1build15.33.2+dfsg1-1ubuntu15.33.2+dfsg1-1ubuntu1+esm1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-21252 is a medium vulnerability (CVSS 5.3) in Jquery-validation, published January 13, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.57%, the 89th percentile. Fixed in jquery-validation 1.19.3.
References
github.com/jquery-validation/jquery-validation/security/advisories/GHSA-jxwx-85vp-gvwm
npmjs.com/package/jquery-validation
security.netapp.com/advisory/ntap-20210219-0005
lists.debian.org/debian-lts-announce/2023/08/msg00040.html
Show 10 moreShow less
nvd.nist.gov/vuln/detail/CVE-2021-21252
jqueryvalidation.org
securitylab.github.com/advisories/GHSL-2020-294-redos-jquery-validation
nuget.org/packages/jquery.validation
security-tracker.debian.org/tracker/CVE-2021-21252
ubuntu.com/security/CVE-2021-21252
cve.org/CVERecord?id=CVE-2021-21252
Left out here: 169 versions. The JSON record has them.